NIGHT OF THE BIG HEAT (1967, UK, 92m, 15) **½ Horror, Mystery, Sci-Fi, Thriller dist. Planet Film Distributors (UK), Maron Films (USA); pr co. Planet Film Productions; d. Terence Fisher; w. Ronald Liles, Pip Baker, Jane Baker (based on the novel by John Lymington); pr. Tom Blakeley; ph. Reginald H. Wyer (Eastmancolor | 1.66:1); m….